氯乙醇

DHCC Constance in the chemistry belongs to the onlighted Cyclopentanoperhydrophenanthrene when it reacted together with the acid Constance it could transform into the fluorescence phenol.we did the flouric determination for the DHCC, in which treated by the ethanol-sulfuric acid or acetic anhydride-methylene chloride-sulfuric acid, acquired standard curve in the 0-40μg/ml presented the liner relet...

DHCC类物质在化学上属于不发光的环戎烷多氢菲类，但与酸性物质一起反应时，可转化为产生荧光的酚类。用乙醇硫—酸或乙酸酐—二氯甲烷—硫酸处理后的DHCC进行荧光检测，获得标准曲线0—40μg/ml范围内呈线性关系，检出的最高灵敏度可达300ng/ml。该方法可用于分离后的DHCC及单一种DHCC代谢物的定性及定量分析。

The insecticidal activities of the ethanol extracts and 5 kinds of extracts with petroleum ether, chloroform, ethyl acetate, n-butanol, aqueous from Rubia cordifolia L. against wolfberry aphis was investigated.

采用点滴法，测定了茜草乙醇提取物和石油醚、氯仿、乙酸乙酯、正丁醇和水5种不同极性萃取物对枸杞蚜虫的触杀活性。

In a large test tube, dissolve 0.5 g (4.5 mmole) of semicarbazide hydrochloride and 0.5 g of anhydrous sodium acetate (or 0.8 g of sodium acetate trihydrate) in 4 mL of distilled water and 7 mL of ethanol.

在一个大试管中，用4 mL蒸馏水和7 mL乙醇溶解 0.5 g (4.5 mmole)的胺基氢氯酸盐和0.5 g无水醋酸钠(或0.8 g的三水合醋酸钠)。

The effects of four different solutions (methanol, ethanol, chloroform, and tetrachloromethane) for the extraction of paeonol were investigated. With the consideration of toxicity, extraction ratio, and the influence on separation, methanol was selected as extractant.

考察了甲醇、乙醇、氯仿、四氯化碳4种溶剂提取丹皮酚的效果，综合考虑提取剂毒性、提取率和对分离的影响，选择甲醇作提取剂。

In chapter 3, 83 volatile chemical constituents have been identified from the petroleum ether extracted part of ethanol extract of Debregeasia longifolia Wedd., and the relative percentages of the compounds are determined by GC method. From the extract of trichloromethane and ethyl acetate, 8 compounds have been isolated.

第三章首次对长叶水麻乙醇提取物的石油醚萃取部分分离并鉴定出83种成分，并用毛细管气相色谱面积归一化法测定了各组分的相对百分含量；从氯仿和乙酸乙酯萃取部分分离得到了8种化合物，用波谱学方法鉴定了其中2种成分。

The technology that synthesizing 3-chlorine-2-hydroxy propyl trimethyl ammonium chloride with ethanol as solvent is simple, the consumption is less than other methods, the solvent can be used many times, the quality of the product is stable.

以乙醇法合成3-氯－2-羟丙基三甲基氯化铵工艺简单，耗能较少，溶剂可循环使用，产品性能优良，使用效果好。

The PMMA macromer was obtained by radical polymerization in the presence of 2-mercaptoethanol as a chain transfer agent, followed by termination with acryloyl chloride.

甲基丙烯酸甲酯进行自由基溶液聚合，巯基乙醇为链转移剂，然后用丙烯酰氯封端制备了聚甲基丙烯酸甲酯大分子单体。

The aromatizing agent is prepared with ethanol, propanediol, triethanolamine, trichlorohydrocarbon diphenyl ether, biphenyl benzylazole, essence and additive and through certain technological process.

该清馨剂由乙醇、丙二醇、三乙醇胺、三氯羟基二苯醚、联苯苄唑、香精及附加剂所组成，经相应的生产工艺而制成。

The method: First of all, with 95%, respectively, ethanol, petroleum ether (60 ℃-90 ℃), acetone, chloroform and other organic solvents for extraction of total pigment shikonin ability to inspect, the better the selection of solvent extraction, and then choose extraction dynamic orthogonal extraction were optimized in order to Shikonin total extraction rate for the pigment inspection targets, optimization of the extraction of the best ways.

首先分别用95%的乙醇、石油醚(60℃-90℃)、丙酮、氯仿等有机溶剂对紫草总色素的提取能力进行考察，筛选出较佳的提取溶剂，再选用浸提法、动态提取法分别进行正交优选，以紫草总色素的提取率为考察指标，优选出最佳的提取方式。

It can dissolve in water alcohol isopropanlol or chloroform not in acetone or diethyl ether polymers having molecular weight under30000 can excreted by human kidney.

乙醇 。异丙醇或氯仿，不溶于丙酮，二乙醚，分子量在30000以下的聚合物能通过人的肾脏排泄。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了